Summary: He had done the unforgivable, he knew that. Albus Dumbledore had died by his wand. But he was no Death Eater, he knew this, Dumbledore had known it, but worst of all Voldemort knew it. Which left him with but one option, an option he nearly hated more than death. His life had been in debt to a Potter before... Severus Snape's fate lies in the hands of the Boy-Who-Lived.